Brake



Nov. 8, 1938. M. P. LIAURYENT'V BRAKE Filed Nov. 20, 1956 Milton P. Laufeni I Patented Nov. 8, 1 938 UNITED STATES PATENT OFFICE BRAKE Milton P. Laurent, Houston, Tex., assignor to W.

K. M. Company, Incorporated, Houston, Tex., I a corporation of Texas Application November 20, 1936, Serial No. 111,760 2 Claims. (01. 188-77) This invention relates to new and useful im- 'Figure 5 is a View similar to Figure- 3, showing provements in brakes. another modification of the invention. by

- One object of the invention is. to provide an In the drawing the numeral ID designates a improved brake for use with large wheels of draw large brake drum or wheel, such as a bull wheel works and other heavy stationary machinery, as of a cable drum II, as s s 111 Oil fi Wo 5 well as for mobile equipment, either heavy or The usual brake band 12 encircles'the wheel H) high speed units. and has one end'attached to the flooror other An important object of the invention is to pro- Suitable pp t y a yfl he Ot er end of vide an improved br k i hi h th lining is the band is attached to a crank l4 formed in a free from positive connection with the drum or Shaft being mounted vin bmCketS "5, wh ch 10' the brake band, whereby said lining may float r are fastened to said floor. The outer end of the move around said drum; and also, whereby the Shaft I5 s provided With a level W ch is usual rivets, or fastening means for the lining adapted to he swung y the Op at in Order are eliminated, which permits the entire area of to actuate Swing the ra k It will be seen 5 the lining to be utilized for the braking operation. (Figure 1) t y swinging the lever ll, the 16 Another object of the invention is to provide Crank is swung 50 that e hand W111. he a brake so constructed that both surfaces of the tightened 0n the Wheel W 0f the drum lining may be employed for braking purp e is the'usual construction for such brakes, and is whereby a more efficient braking is obtained and not claimed p tof the invention, 2 g t life of the lining is increased I Brake lagging or lining I8 is interposed be 20 Still another object of the invention is to protween the Wheel It and the brake band a id an improved b k wherein th brake lining as is clearly shown in Figure 3, is not attached to is unattached to either the brake drum or the either The brakelining fimay be Woven,mold band, with retaining means for holding said band ed, formed in any manner and o y ain position on the drum; said means being eo terial desired. The outer or braking surface of structed so that it may be readily removed to the Wheel is formed With an outwardly exfacilitate mounting or removal of the lining on tendmg annular ring which is preferably Said drum 7 tegral therewith. The ring is disposed along the A' further object of the inventionis to provide Peripher edge portion of the Wheel and is e 30, animproved brake lining which is constructed who? beveled at ohits inner Side (Figllre'3h 305 in a plurality ofarcuate sections or segments one edge ofjthe hhihg formed With a compliadapted to fit around the brake drum to form a beveled edge 25 Which gages in the substantially continuous lining; the sections beuhder'cut of the rihg- The other d e 2| of ing individually removable from the drum for rethe lining is correspondingly v ed. placement, or f r any other mimosa An annular retaining ring 22 is suitably fas- 35 Another object of the invention is to provide a tehed to the Outer edge of the Wheel Such as brake in which the usual rivets or other fastening by bolts 23, and the Outer end of the ring P means for the lining are eliminated, whereby the jects beyond the braking Surface of the Wheel, brake drum or band does not'become scored and Preferably having its Outer end lying in the same 40 longer life for said drum and band is obtained. plane as the Outer end of the integral ring 0. 40

A t ti designed t carry 1; th m The inner side of the extended portion of the vention will be hereinafter described, together ring 22 i under-cut o beve e at so as to with oth f atur s of th i ti engage over the outer beveled edge 2| of the lin- The invention will he more readily understood u e Th retaining g 22 y from a reading of the following specification and be readily removed, as W111 be een in Figures 1, 45

by reference t th accompanying drawing, in 2 and 3, so that the lining may be mounted or rewhich an example of the invention is shown, and moved as desired.

wherein: In operation, when the wheel I0 is revolving and Figure 1 is an isometric view of a, brak the brake band l2 not tightened, the brake lining structed in accordance with the invention; i8 is free from both the wheel and the band, so 50 Figure 2 is an end elevation of th same; that said lining may float on said wheel; although Figure 3 is an enlarged, transverse, ti l at this time the lining will probably rotate with e ta en on the line 33 of Figure 2; said wheel, due to frictional contact with the Figure 4 is an isometric view of a modified form ace e eo a d e rin 20 and W of the invention; and the brake is applied and the band l2 tightened 55 on the lining l8, pressure will be applied to said lining and obviously, the braking will be performed by both flat surfaces or sides of the lining, as said lining is tightened against both band and wheel simultaneously. As above pointed out, the lining will probably be rotating with said wheel, due to slight frictional engagement therewith and with the rings 20 and 22, yet when the brake band is tightened, this rotation will be immediately slowed down or checked and the band tightened between both members simultaneously. It is pointed out that the lining is not fastenedto' either the band or the wheel and it may float therebetween, and thus when the band is tightened there will be more or lessa tendencyfor the braking to occur on bothsurfaces of the liningand not on either the band or the wheel exclusively. When it is desiredito remove. the. lining l 8 from between the wheel and the band, thebolts. 23 are removed and the solid ring 22' maybe slippedfromits place so as .to allow the lining to be removed.

In-Figurel, the'lining I8 has' b'een shown in arcuate'sections-cr segments; These segments, as shown, may beof any size that proves satisfactory, which maybe much larger than shown in the drawing, or. may be even very much smaller. The lining. surrounding said wheel also may bein twoorv three segments and work as satisfactory as a number of segments. One of the advantages of having the lining made into two or more segments, is that should the lining become worn, it is possible that the entire lining will not be worn out, but. only a portion or certain segments. Therefore with-the segments, only the worn por tion needs to be replaced.-

It wilLbe seen'that with-applicants invention, it-is possible to use the. lining for a much longer period of time andv to a greater degree of use, because. of. the ease and quickness with which the worn portion of said lining may be replaced. Inasmuch as itis not attached to either the band l2 or the wheel ID, the usual rivets or other holding means will not take upand waste from onefourth. to one-half of the thickness of said lining, as istrue ofthe present brakes now in common use. The invention is.very flexible and may be readily adjusted. to various conditionsand circumstances encountered in the various installations..

The ring 22 has-been shown in Figures 1; 2 and 3 as made in one piece, whereas in Figure 4 it is shown as being made into a number of pieces or sections 22". It is pointed out that each section of the ring 22" is approximately the same size or slightly larger than one ofthesegments of the brake lining It. It is possible for the retaining ring 22 to be made in any suitable manner, and I have shown only two of the various ways in which the ring could be made, in order to facilitate the mounting and replacing of the brake lining.

In Figure 5, I have shown a slightly modified form of the invention in which the rim 20 is provided with an overhanging lip 24, and retaining ring 22 is provided with a similar overhanging lip 25. In this form, the edges of the brake lining 58'. are not beveled. The lining is mounted beneath and extends between the overhanging .lipsM andv 25, and the band I2 partially surroundsthe lining and extends between the lips 24 and'25.

The invention has-been shown and described'as being applied to the bull wheel-of a draw works, although said invention may very: readily be adapted for trucks, trailers, automobiles; tractors and any other use for which a brake may be required.

What I claim and desire to secure by Letters Patent is:

l. A-brake including,- a brake drum, a movable external braking member, a brake lining interposed between the circumferenceof said drum and said braking member, saidlining; being in separate segments and free from positive connection with eachother and the drum and the braking member, whereby both the inner and outer annular surfaces of said lining are presented for braking purposes, and opposed annular inwardly overhanging circumferential ringson said drum for retaining said lining marginally in its interposed position, the retaining 'ring at one side being in removable sections so that said segments of the brake lining may be replaced.

2. A brake including,- a brake drum, a movable external braking member, and a brake lining interposed loosely between said drum' and said braking member, said drum being annularly channeled circumferentially so that said lining may be placed therein and the side walls. of the channel being undercut to overhang the marginal portions of the lining, one side wall being removable.

MILTON P. LAURENT. 

